Vitaly Petrov's future in Formula One looks in doubt after his manager told Russian media that her driver is lacking the funding to secure a drive.

Petrov is currently driving at Caterham after securing an 11th-hour deal to replace Jarno Trulli midway during pre-season testing at the start of the year. However, Petrov's manager Oksana Kosachenko said her negotiations to secure Petrov a drive in 2013 had stalled due to a lack of funding.

"We've taken a timeout now," she told R-Sport. "I need time to consolidate all our financial possibilities and understand if there's sense in continuing any talks. If there's no money, then there's no driver."

According to the reports Kosachenko is in talks with more than one team but has lost the backing of state-controlled Russian Helicopters and private chemicals manufacturer Sibur. She said Petrov would explore "other options" if negotiations prove to be as prolonged as last year.

Major changes to the shape of English club rugby will take place next season following the approval of proposals to create a 12-team Championship division and to restructure competitions for teams in Levels Three to Six of the league system